Robles, 20, was signed out of the Dominican Republic in 2013. Between Class A Advanced Potomac and Double-A Harrisburg this season, he posted a .300/.382/.493 slash line with 10 home runs and 27 stolen bases in 114 games.
Robles is a five-tool player who has displayed the potential to become a plus-hitter while already possessing plus-plus speed. He is also ranked by MLBPipeline.com as the No. 1 outfield prospect in baseball, with outstanding range and a strong arm.
In the 2017 SiriusXM All-Star Futures Game in Miami, Robles was the Nationals' only participant, and he drove in a run in for the World Team.